package com.pl.grainmall.auth.controller;

import com.alibaba.fastjson.TypeReference;
import com.pl.common.constant.AuthServerConstant;
import com.pl.common.exception.BizCodeEnume;
import com.pl.common.utils.R;
import com.pl.common.vo.MemberRespVo;
import com.pl.grainmall.auth.vo.UserLoginVo;
import com.pl.grainmall.auth.vo.UserRegistVo;
import com.pl.grainmall.auth.feign.MemberFeiginService;
import com.pl.grainmall.auth.feign.ThirdPartyFeignService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.util.StringUtils;
import org.springframework.validation.BindingResult;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.annotation.Resource;
import javax.servlet.http.HttpSession;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

@Slf4j
@Controller
public class LoginController {

    /**
     * 发送一个请求直接跳转到一个页面
     * SpringMVC  viewController ;将请求和页面映射起来
     */

    @Autowired
    private ThirdPartyFeignService thirdPartyFeignService;

    @Autowired
    private MemberFeiginService memberFeiginService;

    @Autowired
    private StringRedisTemplate redisTemplate;

    @ResponseBody
    @GetMapping("/sms/sendCode")
    public R sendCode(@RequestParam("mobile") String mobile) {

        //TODO 1.接口防刷


        String redisCode = (String) redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + mobile);
        if (!StringUtils.isEmpty(redisCode)) {
            long l = Long.parseLong(redisCode.split("_")[1]);
            if (System.currentTimeMillis() - l < 60000) {
                //60秒内不能在发
                return R.error(BizCodeEnume.VAILD_SMS_CODE_EXCECPTION.getCode(), BizCodeEnume.VAILD_SMS_CODE_EXCECPTION.getMsg());
            }
        }

        //2.验证码的再次校验,
        String code = UUID.randomUUID().toString().substring(0, 5);
        String substring = UUID.randomUUID().toString().substring(0, 5) + "_" + System.currentTimeMillis();
        //redis 缓存验证码,防止同一个手机号码在60秒内再次发送验证码
        redisTemplate.opsForValue().set(AuthServerConstant.SMS_CODE_CACHE_PREFIX + mobile, substring, 500, TimeUnit.SECONDS);

        thirdPartyFeignService.sendCode(mobile, code);


        return R.ok();
    }

    /**
     * //TODO 重定向携带数据,利用session原理;将数据放在session中;
     * 只要跳到下一个页面取出这个数据以后,session中的数据就会删掉
     * <p>
     * //TODO 1.分布式下的session问题
     *
     * @param vo
     * @param result             错误消息
     * @param redirectAttributes 模拟重定向携带数据
     * @return
     */
    @PostMapping("/regist")
    public String regist(@Validated UserRegistVo vo, BindingResult result, RedirectAttributes redirectAttributes) {
        if (result.hasErrors()) {
            Map<String, String> errors = new HashMap<>();

//            Stream<Map<String, String>> collect = result.getFieldErrors().stream().map(fieldError -> {
//                String field = fieldError.getField();
//                String defaultMessage = fieldError.getDefaultMessage();
//                errors.put(field, defaultMessage);
//                return errors;
//            });
            Map<String, String> collect = result.getFieldErrors().stream().collect(Collectors.toMap(fieldError -> {
                return fieldError.getField();
            }, fieldError -> {
                return fieldError.getDefaultMessage();
            }));
            redirectAttributes.addFlashAttribute("errors", collect);
            //如果校验出错,重定向到注册页
            return "redirect:http://auth.grainmall.com/reg.html";
        }

        //1.校验验证码
        String code = vo.getCode();
        String s = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
        if (!StringUtils.isEmpty(s)) {
            if (code.equals(s.split("_")[0])) {
                //删除验证码;令牌机制
                redisTemplate.delete(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
                //验证码通过
                //真正的注册,调用远程服务进行注册
                R regist = memberFeiginService.regist(vo);
                if (regist.getCode()==0){
                    //成功
                    return "redirect:http://auth.grainmall.com/login.html";
                }else {
                    Map<String,String> errors=new HashMap<>();
                    errors.put("msg",regist.getData(new TypeReference<String>(){}));
                    redirectAttributes.addFlashAttribute("errors",errors);
                    return "redirect:http://auth.grainmall.com/reg.html";
                }

            } else {
                Map<String, String> errors = new HashMap<>();
                errors.put("code", "验证码错误");
                redirectAttributes.addFlashAttribute("errors", errors);
                //如果校验出错,重定向到注册页
                return "redirect:http://auth.grainmall.com/reg.html";
            }
        } else {
            Map<String, String> errors = new HashMap<>();
            errors.put("code", "验证码错误");
            redirectAttributes.addFlashAttribute("errors", errors);
            //如果校验出错,重定向到注册页
            return "redirect:http://auth.grainmall.com/reg.html";
        }

    }

    @GetMapping("/login.html")
    public String loginPage(HttpSession session){
        Object attribute = session.getAttribute(AuthServerConstant.LONG_USER);
        if (attribute==null){
            //没有登录
            return "login";
        }else {
            return "redirect:http://grainmall.com";
        }


    }

    @PostMapping("/login")
    public String login(UserLoginVo vo, RedirectAttributes redirectAttributes, HttpSession session){

        R login = memberFeiginService.login(vo);
        if (login.getCode()==0){
            //成功
            MemberRespVo data = login.getData("data", new TypeReference<MemberRespVo>() {
            });
            //成功放到session中
            session.setAttribute(AuthServerConstant.LONG_USER,data);
            return "redirect:http://grainmall.com";
        }else {
            Map<String,String> errors= new HashMap<>();
            errors.put("msg",login.getData("msg",new TypeReference<String>(){}));
            redirectAttributes.addFlashAttribute("errors",errors);
            return "redirect:http://auth.grainmall.com/login.html";
        }


    }

}
